This is Hess's Law

Please help me on 7,8,9,10,11 and also help me fil

out in the table ( Experimental value, Accepted

value, Percent error)

Note in question 7: Combine two of equations

algebraically to obtain the third reactions

I include everything you guys need

Please help me

Information:

Question:

Hess's Law: Additivity of Heats of Reaction Essential Question If multiple reaction pathways all result in the same products from the same reactants, will your reaction pathway affect the overall energy change? Introduction In this experiment, you will use a styrofoam-cup calorimeter to measure the heat released by three reactions. By analyzing the data, a relationship between the three reactions will be determined. The reactions we will use in this experiment are: (1) Solid sodium hydroxide dissolves in water to form an aqueous solution of ions. NaOH(s)Na(aq)+OH(aq)H1=? (2) Solid sodium hydroxide reacts with aqueous hydrochloric acid to form water and an aqueous solution of sodium chloride. NaOH(s)+H(aq))+CF(aq)H2O(l)+Na(aq)+Cl(aq)H2=? (3) Solutions of aqueous sodium hydroxide and hydrochloric acid react to form water and aqueous sodium chloride. Na(aq)+OH(aq)+H(aq))+Cl(aq)H2O(I)+Na(aq)+Cl(aq)H2=? Data and Calculations See instructions for Processing the Data on the next page. ASIM Hess's Law student handout, revised 5/2022 Page 1 of 5 7. In the space below, combine two of the equations from page 1 algebraically to obtain the third equation. Indicate the number of each reaction on the shorter lines. Record the heat of reaction for each. 8. Looking at the results of the experiment and #7, how does the combined heats of reaction (H/mol) for two of the equations combined algebraically compare to the heat of reaction (H/mol) for the other overall equation? Using the value in the overall equation as the accepted value and the sum of the other two as the experimental value, find the percent error for the experiment. 9. Do the enthalpies (H) calculated in the lab add up to the total heat released or absorbed? Explain why they should. 10. Is the overall reaction endothermic or exothermic? How can you tell by looking at H ? 11. What are some possible sources of error for this lab? \begin{tabular}{|l|} \hline Experimental value kJ/mol \\ \hline Accepted value kJ/mol \\ \hline Percent error % \\ \hline \end{tabular}